On the Typology of Daily Courses of Tropospheric Ozone Concentrations

During last two decades extensive efforts have been made in modelling and prediction of the tropospheric ozone concentrations. Many statistical methods work on daily characteristics as maximal, average or other values. In the framework of the European union project APPETISE (Air Pollution Episodes: Modelling Tools for Improved Smog Management) a database has arisen holding hourly measurements of ozone concentrations on stations located in five European countries. In this contribution we try to classify typical daily courses of these concentrations. The stations are compared with respect to the occurrence of different types throughout the two-years period 1998–1999. We employed the Kohonen self-organizing maps and multivariate statistical analysis to visualize similarities and dissimilarities between involved stations.